Dual-socket base and plug for electric lights



Nov. 22, 1927.

J.'W. MACKENZIE DUAL SOCKET BASE AND PLUG FOR ELECTRIC LIGHTS Filed April 28- 1925 D E 5 U F IN'V'ENTOR.

Patented Nov. 22, 1927.

, UNITED ST T S 1,649,906 PATENT OFFICE;

JOSEPH w. MACKENZIE- or moRRIsvILLE; PENNSYLVANIA.

DUAL-SOCKET BASE AN rLUGroR nnncrrnro mom-rs.-

Application filed Apri1 2 8, 1925 Serial No. 26,467.

This invention relates to a combined casing or support in which an insula-tingbody of porcelain or the like is produced to accom'modateth'e' metallic parts of lamp sock 5 ets" including the shells and conductors'or contacts, and the said invention has for" anobject the production of aninsula'tlng body which" is practically an integral structure with provision for almostwholly conceal ing: the screw shells and connecting partsof';

a lamp" socket. V 7

It is a further objectof? this invention" to produce a'n' insulating body so made as to accommodate the screw shells and connect ing vparts to produces complete unit' with. out the necessity of utilizing screws, rivets or other mechanicalme'a ns' to hold the parts the other circuit, the same being"a ccomplished inassociation with thebody having the construction practically integral as s'ugi gested, in order that it will be unnecessary to employ mechanical means for maintainingthe structure of the insulating body.

It is a still further object of this invention to produce an insulating body and parts associated with it whereby an electric lighting fixture can be produced inexpensively and compactly, while its appearance will be pleasing and artistic.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts tobe hereinafter more fully set forth and claimed.

In describing the invention in detail, ref erence will be had to the accompanying drawings forming part .of this application wherein like characters denote corresponding parts in the, several views, and in which i Figure 1 illustrates a perspectiveview of an insulating body embodying the inven-.

Figureb view; and p 7 .Figur'e G illustrates a plan View of" the loweriend of the said body. I p

In the present embodiment' of the invention, the body: is constructed for use as v a two-way V socket and. in condition". for the" installation of the" shells, contacts and. oonn'e'ctions, andas here illustrated, thei'hod-y 8 the" shellsock'ets9and'10 and" the extention 11 forming the" plug base are produced preferably by" pressing the same from p'ors cela in-= dust or molding it in forms, or'the" said body may be shaped from plasticpor-k celain, as the inventordoe's notwish to-be';

illustrates a transverse" sectional limited with respect] tofth'eexact' method of shaping or making the body of theffifitare or the insulatingparts associated with it. I a

i The. bridge '12 has its" ends 13" and-"14 shaped comp'lernenta'l to the inner surfaces of the structure between the sockets 9'an'd 10, and the side edges 15 and' 16 of thebridge are curved to form portionsof' the walls of the sockets9fand 10, respectively, in Order that screw shell's may be applied" to" the sockets, tho e'flskilled in the art will understand. a

'The interior of the body is hollow, as

any shown in Fig. 4c and it is the purpose which ribs project inwardly from the top wall 20, when the device is in the position in which it 1s illustrated in Figsgl and 5.

The channel 17 may be employed to' receive contacts to which conductors may be connected and the extension 11 and the said body has a channel 21 formed in it, through which conductors may be inserted leading I to the contacts.

The bridge 12 has a fused joint by which 7 it is attached to and made a part of the fixture and preferably liquid porcelain is introduced in the joint between the main body and the bridge oriinsert if the product is to be unglazed. The'fixture and bridge thus assembled issubjected to heat by such baking processes as will causethe assembled parts to'vitrify.

If the fixture is .to be glazed, the bridge is preferably secured in place by introducing glaze into the joint between the main. bod) and the insert or bridge, and in this condition the fixture is subjected to the V firing process, 1t being understood that the heat should be of such temperature as to" cause the vitrification of the material in the joint, and such action will cause the main portion, Centrally thereof, formed with a pair of opposed protuberances terminating at a point removed from the open top thereof, said body portion further provided with 1 apair of opposed ribs terminating in the top of said protuberances, said protuberances projecting from the bottom of said ribs, and a partition member seated on said protuberances and having said ribs extending into the ends thereof, said member having -op positely disposed arcuate sides cooperating With the inner faces of the ends of the body portionto provide a pair of oppositely inclined circular openings, and an insulation coating'for securing said member to said body portion.

2. A shell for the purpose set forth, comd prising an open top oval-shaped body portion having the ends thereof extending inwardly from said'open top, a partition member mounted in said body portion transversely thereof and further flush With the upper edge of said body portion, said partition member having oppositely disposed 'arcuat-e sides coacting'with the ends of the body portion to provide a pair of oppositely inclined circular openings, and means for securing the partition member to said body portion. a t V 3. A shell. for the purpose set forth, comprising an open topoval-shaped body portion having the ends thereof extending inwardly from said open top, apartition member mounted in said body portion transversely thereof and further flush with the upper edge of said body portion, said" partition.

member having oppositely disposed arcuatel sidescoacting With the ends of the body portion to provide a'pair of oppositely inclined circular openings, said body portion having the upper face of its bottom of arcuate contour and with contact positioning means integral with the upper face of said; bottom, and means for securing sa d member to said body portion.

4. A shell for the purpose set forth, com-. prising an oval-shaped body portion of tapering contour in longitudinal section, said body portion havingthe inner face 'of each side provided with supports positioned below the top thereof and further provided with inwardly extending ribs extended above the supports, a transverse partition member mounted on said supports and coaoting with the ends of the body portion to provide a pair of circular openings, saidniember pro v videclwvith means intermediate its ends for V the reception of said ribs, and means forsecuring said'member to the body portion.

JOSEPH MAGK NZ E f I 

